Segment Information - Schedule of Segment Reporting Information, by Segment (Details) - USD ($) $ in Thousands		3 Months Ended
		Feb. 28, 2022	Feb. 28, 2021	Nov. 30, 2021
Segment Reporting Information [Line Items]
Total consolidated revenues		$ 1,731,915	$ 2,486,942
Total consolidated income before income taxes		392,332	800,785
Total consolidated depreciation and amortization expenses		45,937	38,767
Total consolidated assets	[1]	60,036,451		$ 60,404,110
Reconciling items - Parent Company interest
Segment Reporting Information [Line Items]
Total consolidated income before income taxes		(8,391)	(13,902)
Reportable Segments
Segment Reporting Information [Line Items]
Total consolidated revenues		1,732,055	2,484,292
Total consolidated income before income taxes		400,723	811,888
Total consolidated assets		60,452,092		60,805,150
Reportable Segments | Investment Banking and Capital Markets
Segment Reporting Information [Line Items]
Total consolidated revenues		1,481,818	1,987,496
Total consolidated income before income taxes		420,885	556,231
Total consolidated depreciation and amortization expenses		23,555	20,710
Total consolidated assets		52,646,088		52,903,374
Reportable Segments | Asset Management
Segment Reporting Information [Line Items]
Total consolidated revenues		59,956	229,202
Total consolidated income before income taxes		16,009	183,932
Total consolidated depreciation and amortization expenses		362	479
Total consolidated assets		3,312,921		3,205,799
Reportable Segments | Merchant Banking
Segment Reporting Information [Line Items]
Total consolidated revenues		189,535	267,004
Total consolidated income before income taxes		(24,407)	92,202
Total consolidated depreciation and amortization expenses		21,596	16,714
Total consolidated assets		2,277,138		2,263,050
Reportable Segments | Corporate
Segment Reporting Information [Line Items]
Total consolidated revenues		746	590
Total consolidated income before income taxes		(11,764)	(20,477)
Total consolidated depreciation and amortization expenses		424	864
Total consolidated assets		2,215,945		2,432,927
Reconciling items - Consolidation adjustments
Segment Reporting Information [Line Items]
Total consolidated revenues		(140)	2,650
Total consolidated income before income taxes		0	$ 2,799
Total consolidated assets		$ (415,641)		$ (401,040)

[1] Total assets include assets related to variable interest entities of $1.27 billion and $1.05 billion at February 28, 2022 and November 30, 2021, respectively, Total liabilities include liabilities related to variable interest entities of $3.68 billion and $4.64 billion at February 28, 2022 and November 30, 2021, respectively, and Noncontrolling interests include noncontrolling interests related to variable interest entities of $32.5 million at February 28, 2022. See Note 7 for additional information related to variable interest entities.